Stencil-printing machine.



E. 1.01m. lSTENGIL PRINTING MACHINE.

` Arrmq'non funn 1111.11, 190e. L'yAlga Patented Aug. 19, 1913.

. -5 sums-SHEET 1.

K Wh h "will E. A. 00X. sTBNoIL PRINTING MACHINE.

APPLIATION FILED JAN.11,1909. I 1970,419. Patented Aug. 19, 1913.

5 SHEETS-SHBBT 2.

l E.' A.- 00X. STENOIL PRINTING MACHINE. APPLIOATION FILED JAN. 11, 1909.

Patented Aug. 19, 11913.

5 SHEETS--BHEET 3.

LYAIQ,

E. A. COX.

STENCIL PRINTING MACHINE. APPLIGATION FILD JAN.11,1 909.

3L ,@7094 1 9 Patented' Aug. 19, w13.

5 SHEETS-SHEET 4.

I Wma/TQ@ WIT/1155555 fm E. CDX.

STENGIL PRINTING MACHINE.

APPLIOATION FILED 11111.11, 1909.

LYOAlQ., Patented Aug. 19, 1913.

UN man sTAirisgrAtrnNr orricn.

EDWIN A. cox, or srnAcUsE, NEW YORK, Ass'IeN'oR 'ro THE RoTosPnED coMPANY', or DAYTON, omo, A oRPonATIoN or omo.

' srsNcIL-rriINrrNei MACHINE.

Specification of Letters Patent.

Patented Aug. 19,1 91 3.

Application led January 11, 1909. SerialNo. 471,704.

Machines, of which the following, taken in connection with the accompanying drawings, is' a full, clear, and exact description.

This inventlon relates to certain improvements in stencil printing machines of the= rotary type in which the waxed paper stencil together with the ink distributing pad are mounted'upo-n a suitable drum or cylindrical segment adapted to be rotated by hand or other power in co'action with a suitable impression roller for feeding and printing sheets of paper successively one by one as they are fed thereto.

. The primary object of my present invention is to simplify the paper feed and printing mechanisms and at the same time to render its action more positive and continuous whereby any skilled or unskilled operator may readlly producel neat and accurately printed copies with greater rapidity than has heretofore been possible with this class of machines.

One of the specific objects i-s to provide a simple andk comparatively inexpensive retarding means for preventing the simultaneous feeding by hand of more than one sheet at a timeto the printing mechanism.

Another specific object is to provide a r0-y tary abutment and suitable controlling mechanism` actuated by and synchronized with the movement ofthe stencil supporting cylinder for properly registering the advance end of each sheet with the printing portion of the stencil and at the same time to provide for the adjustment of such actuating mechanism whereby the printing may be spaced varying distances from the advance end of the sheet.

Another object is to provide a simple means for attaching, tightening and releasingl the perforated stencil supporting plate whereby it may be easily removed for cleansing or repairs and readily replaced in operative position.

A still further object is to provide the drum with an ink reservoir and suitable feedlbetween the printing couple.

c ing means whereby the ink may be expressed o r ejected in such quantities as lmay be desired through the perforations of the stencil supporting plate and against the inking pad thereby rendering the operation of inking the pad more cleanly and less laborious. v

Other objects and uses relating to special features of construction will be brought out in the following description.

In the drawings-Figures 1 and 2 are respectively a top plan and a side elevation of a stencil printing machine embodying the various features of my invention. Figs. 3 and 1 are respectively a transverse vertical sectional view and a longitudinal sectional view taken on lines 3 3, Fig. 1 and 4 4-, Fig. 2, Fig. 3 being somewhat enlarged. Fig. 5 is an enlarged top plan of the stop roll Aand superposed presser plate showing adjacent portions of the frame and paper support." Figs. 6, 7 and 8 are enlarged detail end views of the stop roll and its controlling mechanism including portions of the'sten'cl supporting cylinder and impression roll, the stop roll and its controlling mechanism being shown in different positions assumed as the paper progresses to or Fig. 9 is an enlarged detail sectional View through a portion of the stencil supporting drum showing particularly the means for attaching the stencil and adjacent portion of the ink reservoir and piston plate for expelling the ink from the reservoir. Fig. 10 is a longitudinal sectional view partly broken away through one end of the ink reservoir showing the mechanism for operating the piston plate. Fig. 11 is a plan view partly broken away of the perforated stencil supporting plate; Figs. 12, 13 and 14 are sectional views' taken respectively on lines 12--12, 13-13, and 14e-14, Fig. 11, Fig. 14 showing the movable means for clamping the perforated plate to the drum. Fig. 15 is a scctional view taken on line 15-15 Fig. 11, sho-wing an inner face view of one of the end guides for impression roller. Fig. 16 is an end view of a modified form of actuating mechanism for the stop rollers consisting of an adjustable toothed rack or ring on one end of the drum and adapted to engage a presser plate used in connection with the actuating mechanism shown in Fig. 16. Figs. 18 and 19 are sectional views taken respectively on lines 18-18 and 19-19, Fig.,

16. Fig. 20 is a detail sectional View showing the ends of the presser roller and stop roller, together with a paper stripping device for stripping the sheet from the stencil as it is fed through the machine. Fig. 21 is an end elevation of a portion of the drum showing particularly the brake mechanism for preventing the rotation of the drum backwardly.

This stencil printing machinek comprises essentially a stop feed for registering and feeding the sheets to the printing couple, means for controlling the action of the stop feed mechanism, and a supporting and retarding rest for the sheet to be printed whereby they may be readily fed byhand one at a time to the stop feeding device.

Printing couple-The printing couple consists essentially of a stencil supporting drum -1- and an impression roll -2 mounted one above the other in a suitable supporting frame -3- and having thelr axes disposed in the same vertical planelan'd parallel with each other.v The stencil supporting drum -1- is actuated by intermeshing gears -4- and a suitable hanfd piece n*5- and preferably consists of 'opposite end heads -6-, and a perforated stencil supporting segment -7-. This stencil supporting segment 7- preferably consists of a perforated sheet metal platel of equal or greater area than that of ordinary legal cap or letter note paper and is substantially semi-cylindrical in form and is removably secured to the peripheries of thfe end heads -6- in a manner presently described, said segment together with the end heads forming a hollow drum with a clear open space in one side to permit access to the interior of the drum for cleansing dr applying ink from the interior through the perforations to the pad. The opposite ends of the perforated segment -7 are bent wardly upon the main body and returned outwardly forming lengthwise grooves -10- for receiving the ends of a stencil -9- and an ink pad -8- together with suitable fastening means as clamping bars 11'- and -11- by which the ends of the stencil and pad are firmly retained in place wholly within the outer surface of the stencil. 1

The stencil supporting plateor segmen -7 is provided with opposite end and intermediate pairs of slots -12 and -13-, the end slots being key-hole shape to receive corresponding pairs of studs -15- and 16 projecting from the peripheries of the end heads -6- while the apertures -13- are adapted toreceive suitable studs -17- also projecting from the peripheries The studs -15- are in this instance permanently secured to inwardly projecting anges on the end heads' -band are provided at their outer ends with suitable heads which are spaced apart from the periphery of the heads a distance corresponding to the thickness of the stencil supporting plate or segment -7- and are of greater diameter than the smaller p01'- tions of the slots through which they pass so as to firmly lock the corresponding-end of the segment to the drum heads against radial or lengthwise displacement. In like manner the intermediate studs -17- are secured to the end heads t3- and project into the apertures -13- to retain the central portion of the plate against lateral movement, the apertures -13 being elongated in the direction of length of the plate to permit said plate to be moved lengthwise in placing it upon or removing it from the end head -G-. v

The studs 1G- are movable longitudinally` of the plate and are headed similar to the studs -15- but in this instance are mounted upon the outer ends of swinging arms -18- which extend radially of the drum and are pivotally mounted at their inner ends upon the hubs of the end heads -6- thereby allowing adjustment of .the studs 16- lengthwise of and in the same pl ane as the segment 7- to draw said segment tightly upon the drum heads and hold it in its adjusted position. Any suitable means may be employed for moving these studs -V-16- lengthwise of the plate or segment which they are adapted to clamp in place and for this purpose I have shown an operating bar -20- eccentrically mounted upon a pair of swinging members or levers -21- which are pivoted to the end heads 6- so that by moving the levers n21 in one direction the bar -20- will be forced against the adjacent end of the arms -18- thereby moving the studs-16'- against the outer ends of their slots and firmly drawing the ends of the stencil supporting plate againstthe periphery of its supporting drums while on the other hand` by shifting the lever in the other direction and thereby throwing the eccentric rod 20- away from the arms --18--, the studs -16- may be moved into registration with the other ends of their respective openings thus permitting the stencil plate to be moved endwise in the same direction and removed from their clamping studs 15 and -l7-. It is evident, however, that many other forms of tightening and releasing devices may be em-l ployed to enable the stencil supporting plate to be easily and quickly clamped in place or removed for cleaning or repairs. Another object in making the stencil plate removable is to enable such plate with the stencil thereon to be removed and laid asideand another plate with a different stencil thereon substituted without removing either' stencil from its supporting plate.-

'l`he stencil supporting drum is also provided with an ink vreservoir -22- covering the inner face of the perforated portion of the segment -7- and located between opposite ends of said segment, which lat-ter forms the outer wall lof the reservoir, the inner -wall of said reservoir consisting of a sheet metal plate -23 having its ends rigidly secured to the opposite ends of the segment and its intermediate -portion spaced some distance apart from said segment forming a crescent shaped reservoir embracing the enti-re perforated port-ion of the segment. The inner wall of the reservoir is provided with .an inlet -24- through which such reservoir may ybe filled, ,the inlet being norinally closed by a suitable cap -25-. With in .tl-ie reservoir and substantially coextensive therewith is a movable piston consisting of a flexible Vpla-te -26- which is secured at one end tothe reservoir and its other end is attached to and adapted to be wound upon and unwound from ya suitable roller 27- -as best -seen in Figs. 3 and 10, the adjacent end of the inner wall being returned upon itself to receive said roller. This roller is journaled at its opposite ends in the end heads- 6- and is provided at ,one end with a suit-able hand lever 28for rotating the roller 27- and thereby moving the piston plate -26- radially. A packing -2 9- is interposed between one end of the roller -27- and adjacent head -6- to prevent leakage of the ink from the reservoir at this joint, the opposite journal bearing for the roller being closed. The piston or flexible plate -26- is substantially semi-cylindrical in 4cross section and extends from end to end of the reservoir leaving just sutlicient clearance at the ends to permit the ink to be expelled from .the inner side to the outer side of said piston and through the perforations in the stencil supporting segment Where it comes in contact with' and is distributed by the ink pad over the entire surface of the stencil.

The hand lever Q8- for operating the roller -27- is provided with a pin 30 adapted to enter any one of a series of apertures -31 in the adjacent end head -6- to hold the roller -27- and piston -26 in its adjusted position, the lever -28- being made of spring metal to permit it to be sprung laterally to withdraw the pin 30- from the aperture with which it may be registered thereby permitting such adjustment and operating by its own spring tension to hold the locking pin in operative position.

rlhe roller -27- is spring pressed endwise against the packing -29- by suitable spring -32 which is interposed between one end of the roller -27- and inner face of the adjacent head -6- as best seen in Fig. l0, and one end of the piston plate -6- is inserted in a lengthwise slot in the 70 roller -27-. llt is evident that when it is Vdesired to fill the reservoir with ink,- the lroller -27- may be operated to unwind the adjacent end of the piston plate Q6- therefrom .thereby forcing said piston plate radially and outwardly toward the perf0- rated segment --7- thus leaving practically the full capacity of the reservoir for the reception of the ink .after which the roller w27-may be rotated in the'opposite direction to wind the adjacent end of the piston plate thereon thereby drawing the latter toward the inner wall of the reservoir and ex- -pelling the ink around the ends thereof into the -outer portion of the reservoir and through the perforations of the segments -7 Where it is readily taken up by the absorbent pad -8- and distributedl evenly' over the inner surface of the stencil.

The clamping bars or plates --1land -11- for the stencil -9- and ink pad 8e constitute an important feature of my invention in that they afford a convenient and adjustable means for receiving and clamping the ends of such parts and are .readily inserted into or removed from the grooves l0- and when so inserted draw the ends ofthe stencil and pad inwardly around the ends of the segment and` toward each other where they are firmly held in place by the tension of the stencil and pad.

The impression roller -Q-which consti, tutes the other part of the printing couple is adjustable toward and from the lower side of the drum -1- or into and out of con- 105 tact with the stencil and for this purpose is mounted in vertically movable bearings 35- which are guided in suitable ways -36- on the opposite ends of the main supporting frame as best seen in Fig. l5 and 110 are normally spring-pressed toward the periphery of the drum by suitable springs -37-. The guides #3G- are provided with laterally extending openings -38 to permit the presser roller -2- to be re- 115 moved from the machine.

The means for moving the presser roller -2- away from the drum -1- and against the action of the springs -37- consists of suitable cams -39- whichfare connected 12( by a shaft -40- and bear against suitable shoulders -41- on the ends of the main supporting frame -3, said shaft being provided with an operating handle 42w by which the cams which are secured to the shaft may be rotated against the bearing shoulders -41-, the throw of the cams being suliicient to withdraw the compression roller -2 downwardly some distance from the side of the drum 1- and clear 130 from the path of movement ofthe stencil v to prevent inking of the compression roller or mutilation of the stencilwhen the machine is not in use. l l

Stop mechafnsm.--This stop feed mechanism serves to regulate and synchronize the registering and feeding of the sheets one by one to the printing couple and consists as shown in Figs. 1 to 8 inclusive of a stop l length with that of t e drum or at least with that of the stencil which is carried by the segment -7- and is provided with a lengthwise groove 46 extending from end to end and forming an abutmentv L17-against which the advance edges of the sheet are fed by hand to properly register such sheet preparatory to advancing it to the printing couple. This stop roller -43- is operated intermittingly one complete revolution during each revolution of the drum -'1- and when at rest the open side of its groove -46- and its abutment -47- faces the supportrv upon vwhich the sheets to be printed are stacked, that is the abutment extends in substantially a vertical position at the top of the roller or in a horizontal position substantially coincident with -that upon which the edges of the sheet-s rest and also in about the same horizontal plane as that of the meeting faces of the printing couple so that when the-sheet is advanced it enters directly `between the printing ele ments at theproper time and in position to produce the printing upon the sheet where desired. The intermediate portion of the stop roller 43- which is adapted to engage with `the stencil is preferably made of rubber but its ends are usually made of some hard substance as metal or vulcanized fiber for forming bearings for the spring arms of a presser plate presently-described.

The pawl w44- is centrally fulcrumed at -49--- upon one end of the main supporting frame adjacent to the corresponding end of the roller 453- and is provided at its rear end with a stop shoulder 5G- adapted to 4be engaged by .a stop pin -51 on the adjacent end of the roller-5- to temporarily hold the latter against rotation by contact of the sheet with the abutment -47-. The opposite or front end of the pawl is provided with an idle roller 52- normally lying in the path of movement of the shoe -45- which operates at the proper time to trip said pawl '-44 to release the shoulder -50- from holding engagement with the .stop pin -51-.

While the stop roll -43- is at rest the uppermost sheet of paper is fed from the stack by hand against the abutment -47 and in orderthat the roller-43 may be operated at the proper time to feed the registered sheet to the printing couple, it 1s necessary to provide some means for temporarily pressing the advance end of the sheet against the surface of said roller just in front of the abutment and into the groove -46- and for this purpose I have provided a bar -55-- which is mounted upon a rocking shaftl 56- and vits rear edge is preferably rounded and spring-pressed by a suitable spring 57+- toward the upper sur- \face of the roller w43-, but is held against `the action of said spring a slight distance away from the roller by rearwardly projecting'iingers 58- on thev vends of the bar 55, said fingers being normally engaged .with the outer `gdge or periphery of the abutment -47- when the roller 4B-f is at rest as shown by dotted lines in Fig. 6.

In order that the presser bar -55- may be operated at the proper time to press the abutting or advance end of the sheet against Athe roller to permit the latter to feed such sheet to the printing couple, I provide the rear end of the pawl -44 with a down# wardly and rearwardly inclined shoulder -59 just below and in front of the stop shoulder -50*- a sufficient distance to permit the entrance of the stop pin -51- between the upper end of said inclined shoulder and overlying portion of the pawl and against the stop shoulder -50-.

The shoe 45- is preferably concentric with the axis of the drum -1- and is positioned relatively to the stencil so as to engage thc roller -52- and thereby depress the front end of the paw] -44- some time before the printing portion of the stencil is alined with the advance end of the sheet to be printed or at least some time before the advance end of the stencil reaches the point of'contact with the impression roller -2- and during which operation the shoulder -50- is elevated and released from holding engagement with the pin 51 and causes the inclined shoulder -59- to ride against the front face of said pin thereby effecting a slight degree of rotation of the stop roller N43*- in the direction indicated by the arrow, Fig. 8 sufficient to move the outer edge of the abutment -47- out from under the presser bar 55 which allows said presser bar -55- to be depressed against the advance end of the sheet and to temporarily hold the latter in contact with the periphery of the stop roller.

being of sufficient length to rotate the roller -43- one complete revolution and to alsition to bring its shoulder -50- into the path of and to engage the pin 5l and therebv temporarily check the rotation of the roller -43- leaving the `fingers -58- resting on the high point of the abutment to hold the presser plate -55- away from the roller thereby allowing the balance of the sheet to be fed rearwardly by the printing couple without friction between the presser plate and stop roller. It is now clear that as each sheet is fed against theabut-ment -47- of the stop roller -43- while the latter is at rest and while the drum -1- is still rotating, the shoe -45- operates the pawl -44- to trip it from holding engagenient with the pin -51- and at the same time the inclined shoulder -59 operates against said pin to slightly advance the roller -43- sufficient to allow the presser plate -55- to press the sheet against the periphery of the stop roller 4B-n Immediately after this action of the presser plate -55- the shoe -45- contacts with and rotates the stop roller -43- one complete revolution thereby feeding the sheet to the printing couple where it is caught and fed entirely through the machine with the imprint of the stencil thereon in the proper position.

It is sometimes preferable to provide means for beginning the printing at different distances from the advance end of the sheet and for this purpose the shoe #15 is adjustable circumferentially relatively to the stencil or drum and is mounted upon a radial arm -62- which is journaled at its inner end upon the hub of head -6- so as to move the shoe -45- concentrically around the axis of the drum. The radial arm #62- is provided with a stop pin -63- adapted to enter any one of a series of apertures --64- in the adjacent end head of the drum -1, said stop pin being in t-his instance, mounted upon one end of a bell crank lever -65- which is fulcrumed at *436* and is provided at its other end with a pin -67- movable into and out of engagement with any one of a series of apertures -68- in the arm -62-. The pin -63- passes through an elongated aperture -69- in the arm -62- to allow a limited adjustment of the lever -65- for effecting a closer adjustment of the shoe 45- relatively to the drum. That is, by withdrawing the pin 63- from locking engagement in the apertures -64-, the shoe -l5- may be rotated by hand to approximately the desired position of adjustment, whereupon the pin 63- may be caused to renter the nearest aperture W$4-, it being understood that during this adjustment the pin -67 is in interlocking engagement with one of the apertures #68-. Now, if the adjustment is not quite correct, the pin -67- may be withdrawn from its aperture S8- by springing the arm G5-4 outwardly,` thereby permitting said yarm or lever -65- to be rocked upon its pivot -66- with the pin e--Grstill locked in one of the, apertures the relative movement of the parts -6- and -62- while the opening through which the pivot -66- is passed is also elongated to .compensate for the varying distances between the centers of the pivots -63- and -66- during such adjustment. After this extra adjustment has been made, the pin 67- is allowed to again enter one of the apertures -68- to lock the members -6- and -62 against further relative movement. The arm -62 is made of spring metal tensioned toward the adjacent end of the drum but adapted to be sprung outwardly to disengage the pin from the aperture with which it may be registered, thus permitting the circumferential adjustment of the shoe. In like manner the handle end of the lever -65- is made of spring metal normally tensioned toward the arm -62- to hold the pin -67- inoperative position but is adapted to be sprung outwardly 'to disengage such pin 67e from the aperture with which it may be registered thus permitting a further adjust-ment of the drum relatively to the lever.

Sheet supporting cmd retin/'ding means.- 'lhe sheets as -ato be printed are stacked in suitable quantities one upon the other upon an inclined table or support -70- having a roughened retarding face 7l at its front end, said retarding face being disposed at an obtuse angle with the remaining portion of the table and in substantially the same horizontal plane as the upper `face of t-he stop roller -43. The sheets are, therefore, supported in an inclined plane and ravitate endwise against the roughened sur ace -71- which is made of sand paper, emery or other rough material and serves to hold the underlying sheets against rearward feeding while the upper sheet is being fed by hand across said roughened surface and against the abutment of the stop roller 4S- This table is loosely held between suit-able rests or shoulders +74- and -75 which project inwardly from opposite sides of the frame -3- and are located at different distances from the longitudinal center of the machine, the supporting pin -Mfbeing preferably located in close proximity to the roller -43 and engage the upper surface of the adjacent ends of the table while the other shoulders -75- are located farther forward and engage the under side of the adjacent ends of the table, the latter shoulders being adapted to be inserted in one of a series of apertures 7G- to permit thetable to be adjusted to dierent angles and plate .-89- similar to the presser at the same time permitting such table to be withdrawn by simply elevating lts front end and drawing it forwardly and upwardly.

In Fig. 16 I have shown a drum 1 as provided with a modified actuating mechanism for the stop roller consisting of a ring -80- adjustable circumferentially around and upon one end of the drum and provided with a toothed rack `-81 adapted to engage a mutilated gear v-82-, on one end of a stop roller 483-, The rack -81- and mutilated gear S2- constitute a positive driving mechanism for the stop, roller 83- to take the place of the friction shoe -45- and friction wheel -60- of the device shown in Figs. l to 8 inclusive, the toothed rack -81- having substantially the same rotate the stop roller -83- one revolution during each revolution of the drum. The ring -80- is adjustable circumferentially around and upon the drum for the same purpose that the shoe -45- is adjustable and is held in its adjusted position by a clamping screw -86- as best seen in Figs. 16 and 18 and additional screws-87- which are located at intervals in the end of the drum to retain the ring -80- in place against endwise displacement. The greater portion of the periphery of the ring -80- is smooth and concentric with the axis of the drum and in the same plane as the pitch line of the rack and rides against a concave face ,-88- on the mutilated gear -82- to hold the stop roller -83- against rotation until about ready to be engaged by) the rack -81-. lIn Fi 17 I have shown a presser late -55- except that the rear edges o the fingers -58- normally bear against inclined or beveled shoulders -90- on the ends of the roller -83- but serve the same purpose namely to hold the presser bar away from the roller when the latter is at rest to permit the sheets to be fed one by one against the abutment -49-. the periphery of the ring -80- is cut away at -93- slightly within the pitch line just in advance of the rack -81- so as to clear the bearing face -88- of the gear -89- and thereby permit the spring fingers -89- of the presser bar to ride downwardly against the inclined face -90- and thereby rotate the roller `83- a slight degree sufficient to allow the presser bar -89- to ride may abut.

against the sheet of paper which against the abutment -49-. Otherwise the action of this device shown inv Figs. 16 to 19 inclusive is substantially the same as that described in the construction shown in Figs. 1 to 8 inclusive.

Referring again to the ink reservoir it will be seen that by making the plates -23- and 2G- substantially coeXtensive A short portion ofin area with that of the perforated stencil plate and stencil --9-, they constitute -a covering which reduces the evaporation of the ink, and thereb prolongs the efliciency of the machine wit out reinking.

Another important feature of this invention is the means for strip ing the' paper from the stencil as it is fed t rough the machine. This is particularly effective in operating upon extremely thin paper to prevent the latter from adhering to and being carried around with the stencil during the printing operation. This stripping means comprlses, in this inst-ance,l two presser fingers -94- extending transversely to the axis and in close proximity of the presser roller 2* and also at opposite ends of the perforated or printing portion of the stencil, the rear ends of said fingers, which preferably consist of springs being spring pressed downwardly slightly below the upper plane of said roller -2-, so as to deflect the longitudinal edges of the sheet downwardly at the ends of said roller thereby stifi'ening the advancing sheet and cause it to travel in a horizontal plane rearwardly away from the stencil. The front ends of the fingers 94- are disposed in a plane slightly above the plane of travel of the sheet as it is fed forwardly by the -stop roller, so

95 as to cause the edges of said sheet to ride under said fingers. The bearing points of the fingers, which engage the sheet, lie directly over the axis of the roller -2-, so as to turn the edges of the sheet downwardly directly at the meeting faces of the roller -2- and stencil where the pressure upon the printed sheet is greatest to prevent sticking of the sheet to the stencil while traveling through the machine.

It is desirable in this class of machines to prevent backward movement of the drum carrying the stencil, and for this purpose I have provided a brake shoe -96- pivoted at one end at -97- to a stationarysupport -98-, and having its free end riding against an annular ange or bearing on one end of the drum, the distance between the brake faces of the movable member -96- and axis of the drum through the pivot -99-- being greater than the radius of the inner bearing faces of the flange 100- which permits the drum to be rotated in the direction indicated by the arrow X, and prevents its rotation in the opposite direction.

The operation of my invention will be readily understood upon reference to the fore- 'going description and the accompanying drawings. Attention, however, is called to applicants co-pending applications #537,440,

filed Jan. 11, 1910, and #604,604 filed Jan. y

25, 1911, The relation between each of said co-pending applications and the present case is that each machine shows a stencil supporting drum, means forregulating the head space on the printed sheet, and a` movable abutment against which the sheets are fed to aline and direct the sheet between the stencil drum and underlying presser' roll.

What I claim is:

1. In combination with a rotary stencil supporting drum and actuating means therefor a presser roller coacting with the drum, a sheet support some distance in front of the presser roller, rotary alining and feeding means between the presser roller and paper support, and means rotating with the drum for actuating the feeding means intermittingly one revolution at a time.

9.. In combination with a rotary stencil supporting drum, a presser roller coacting with the drum', la sheet support in front of the presser roller, a stop roller located between the sheet support and presser roller and provided with a lengthwise abutment for the advance ends of the sheets, and means rotating with the drum for actuating said stop roller.

3. In combination with a rotary stencil supporting drum, a presser roller coacting with the drum, a support for the sheets to be printed, rotary means between said sheet support and presser roller for alining and feeding the sheets between the presser roller and drum, means rotating with the drum for actuating said feeding and alining means, and separate means controlled by the drum for stopping the alining and feeding means at the end of each revolution.

4. In a stencil printing machine, a stop roller having a lengthwise abutment for the advance edge of a sheet to be printed, and a sheet support having a retarding rest for t-he edges of the sheets in the plane of said abutment.

5. In a stencil printing machine, a stop roller having a lengthwise abutment for the advance edge of a sheet to be printed, and an inclined sheet support having a substantially horizontal retarding rest for the edges of the sheet, said restvbeing disposed in substantially the same horizontal plane as the abutment.

6. In a stencil printing machine, a stop roller having a lengthwise abutment for the advance edge of a sheet to be printed, and

an inclined sheet support having a substantially horizontal roughened retarding resty for the advance edges of the sheets, said rest being disposed in substantially the same plane as and in close proximity to the abutment.

7. In a stencil printing machine, a stop roller having a lengthwise abutment for the advance edge of a sheet to be printed, and a presser-bar normally springpressed against the periphery of the abutment and adapted to press a sheet against the roller as the latter is rotated.

8. In a stencil printing machine, a stopagainst the periphery of the abutment and m ada ted to press a sheet against the' roller as t 1e latter is rotated, and means for actuating the roller sufficient to move the abutment from engagement with the presser bar.

9. In a stencil printing machine, a stop roller having a lengthwise abutment for the advance edge of a sheet to be printed, a rotary stencil supporting drum, and means synchronized therewith for rotating the stop roller one revolution at each revolution of the drum.

10. In combination with a rotary stencil supporting drum, a presser roller coaeting therewith, a support for the sheets to be printed, a feed roller between the presser roller and said support and provided with a lengthwise abut-ment for the ends of the sheets, and means rotating with the drum for actuating the feed roller one revolution during each revolution of the drum.

11. In a stencil printing machine, a rotary stencil support, a roller having a lengthwise recess in its periphery forming an abutment for thefadvance end of the sheet, and means controlled by the stencil support for actuating the roller.

12. In a stencil printing machine, a rotary stencil support, a roller having a port and presser roller, means rotating with the drum for shifting said abutment oncel during each revolution of said drum, and additional means moving with the abutment for feeding the sheets one by one from the support to and between the presser roller and drum.

14. In a stencil printing machine, a rotary stencil support, a roller having an abutment for the advance end of a sheet to be printed, a presser bar spring pressed toward the roller, means normally holding said bar away vfrom the roller, and means comprising an actuator on the stencil support for moving said holding means from its holding position.

15. In a stencil printing machine, a rotary stencil support, an impression roller adjustable toward and from the support, a rotary abutment in front of the meeting faces of the support, and r'oller, a-presser bar no1'- In witness whereof I have hereunto set mally spring-pressed against the abutment, my hand this 26th day of December 1908. and means comprising an actuating member EDWIN A. CQX, rotatable with and adjustable relatively to said support for controlling the action of the presser bar and abutment.

Witnesses:

H. E. CHASE, C. M. MCCORMACK. 

